Carbon Nitride Quantum Dots:A Novel Fluorescent Probe for Non-Enzymatic Hydrogen Peroxide and Mercury Detection

作     者：CHEN Lei LI Quan WANG Xing WANG Wentai WANG Lisha CHEN Lei;LI Quan;WANG Xing;WANG Wentai;WANG Lisha

作者机构：Key Laboratory of Marine Chemistry Theory and TechnologyMinistry of EducationCollege of Chemistry and Chemical EngineeringOcean University of ChinaQingdao 266100China 

出 版 物：《Journal of Ocean University of China》 (中国海洋大学学报（英文版）)

年 卷 期：2023年第22卷第6期

页      面：1572-1582页

核心收录：

学科分类：0710[理学-生物学] 071010[理学-生物化学与分子生物学] 070702[理学-海洋化学] 07[理学] 0707[理学-海洋科学] 

基　　金：support from the Natural Science Foundation of Shandong Province(No.ZR2021 MB075) National Natural Science Foundation of China(No.51602297) the Opening Fund of State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering(No.2021-K53). 

主　　题：carbon nitride quantum dots hydrogen peroxide Hg2+ fluorescence probe 

摘      要：The mercury species in the ocean(MeHg,Hg^(2+))will be enriched in marine organisms and threaten human health through the food chain.While the excessive H_(2)O_(2)in the metabolic process will produce hydroxyl radicals and accelerate the aging of human cells,causing a series of diseases.Hence,the cost-effective and rapid detection of mercury and H_(2)O_(2)is of urgent requirement and significance.Here,we synthesized emerging graphitic carbon nitride quantum dots(g-CNQDs)with high fluorescence quantum yield(FLQY)of 42.69%via a bottom-up strategy by a facile one-step hydrothermal method.The g-CNQDs can detect the H_(2)O_(2)and Hg^(2+)through the fluorescence quenching effect between g-CNQDs and detected substances.With the presence of KI,g-CNQDs show concentration-dependent fluorescence toward H_(2)O_(2),with a wide detection range of 1–1000μmolL^(-1)and a low detection limit of 0.23μmolL^(-1).The g-CNQDs also show sensitivity toward Hg^(2+)with a detection range of 0–0.1μmolL^(-1)and a detection limit of 0.038μmolL^(-1).This dual-function detection of g-CNQDs has better practical application capability compared to other quantum dot detection.This study may provide a new strategy for g-CNQDs preparation and construct a fluorescence probe that can be used in various systems involving H_(2)O_(2)and Hg^(2+),providing better support for future bifunctional or multifunction studies.